<template>
   <el-container class="home-container">
       <!-- 头部区域 -->
      <el-header>
          <div>
              <img src="../assets/heima.png" alt="">
              <span>电商后台管理系统</span>
          </div>
          <el-button type="info" @click="logout">退出</el-button>
      </el-header>
      <!-- 页面主题区域 -->
      <el-container>
          <!-- 侧边栏 -->
        <el-aside :width="isCollapse ? '64px' : '200px'">
            <div class="toggle-botton" @click="toggleCollapse">|||</div>
            <!-- 侧边栏菜单区 -->
          <el-menu  background-color="#333744" text-color="#fff"
          active-text-color="#409BFF" unique-opened :collapse="isCollapse"
          :collapse-transition="false" router :default-active="activePath">
          <!-- 一级菜单 -->
            <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                <!-- 一级菜单的模板区域 -->
               <template #title>
                   <!-- 图标 -->
                  <i :class="iconsObj[item.id]"></i>
                  <!-- 文本 -->
                  <span>{{item.authName}}</span>
               </template>
               
               <!-- 二级菜单 -->
                  <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
                      <template #title>
                   <!-- 图标 -->
                  <i class="el-icon-menu"></i>
                  <!-- 文本 -->
                  <span>{{subItem.authName}}</span>
               </template>
                  </el-menu-item>
            </el-submenu>
          </el-menu>
        </el-aside>
        <!-- 右侧内容区域 -->
        <el-main>
            <!-- 路由占位符 -->
            <router-view></router-view>
        </el-main>
      </el-container>
   </el-container>

</template>


<script>
export default {
    data() {
        return {
            //左侧菜单数据
            menulist: [],
            iconsObj:{
                '125':'iconfont icon-user',
                '103':'iconfont icon-tijikongjian',
                '101':'iconfont icon-shangpin',
                '102':'iconfont icon-danju',
                '145':'iconfont icon-baobiao'
            },
            //是否折叠
            isCollapse: false,
            //被激活的链接地址
            activePath:''
        }
    },
    created (){
        this.getMenuList()
        this.activePath = window.sessionStorage.getItem('activePath')
        this.activePath = this.$route.path
    },
    methods:{
        logout(){
            window.sessionStorage.clear()
            this.$router.push("/login")
        },
        //获取所有的菜单
        async getMenuList() {
            const{ data: res } = await this.$http.get('menus')
            if(res.meta.status !==200) return this.$messge.console.error(res.meta.msg)
            this.menulist=res.data
            console.log(res)
        },
        //点击按钮,切换菜单的折叠与展开
        toggleCollapse(){
            this.isCollapse=!this.isCollapse    
        },
        //保存链接的激活状态
        saveNavState(activePath){
            window.sessionStorage.setItem('activePath',activePath)
        }
    }
}
</script>

<style lang="less" scoped>
.home-container{
    height: 100%;
}
.el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div{
        display: flex;
        align-items: center;
        span{
            margin-left: 15px;
        }
    }
}

.el-aside {
    background-color: #333744;
}

.el-main {
    background-color: #EAEDF1;
    .el-menu {
        border-right: none;
    }
}
.iconfont{
    margin-right: 10px;
}

.toggle-botton{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
}
</style>